Htaccess

Redirect for SSL

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Another SSL redirect option

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}

Two domains pointing at a website one has a different starting point.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^domain.com$ [OR]
RewriteCond %{HTTP_HOST} ^www.domain.com$
RewriteRule ^$ http://domain.com/filename.html [L,R=301]

301 Redirect

Redirect 301 /oldfile.htm http://example.net/

Note that while the old file is a necessary parameter, it can be set to '/' (without the single quotes) to define all requests to that folder. Such as:

Redirect 301 / http://example.net/

Auth for Single Page or Multiple

Protect pages via htaccess or even whole directories.

This will help with creating the htpasswd file http://www.htaccesstools.com/htpasswd-generator/

<Files "mypage.html">
#if you want the whole directory you don't require the Files clause here
# also if you have the entirety of the auth info in the files clause you can do separate files with separate login information
AuthType Basic
AuthName "Protected Page"
AuthUserFile /Full/Path/To/.htpasswd
Require valid-user
</Files>